Space Shuttle Endeavour astronaut Scott Parazynski and Canadian astronaut Chris Hadfield work on the Destiny module panel to connect cables for the Canadarm 2 robotic arm to the International Space Station on April 24, 2001. Parazynski and Hadfield worked on the power and data system that will allow the station’s new construction robot to go to work. SV/ME – RTRHD4X

Canadian astronaut Chris Hadfield, Russian cosmonaut Roman Romanenko and U.S. astronaut Thomas Marshburn (L-R) pose for a picture before an exam on a simulator of the International Space Station at the Russian cosmonaut training centre at Star City outside Moscow November 28, 2012. The three-man crew is scheduled to fly to the International Space Station in December. REUTERS/Sergei Remezov (RUSSIA – Tags: SCIENCE TECHNOLOGY TRANSPORT) – RTR3AYI9

The International Space Station (ISS) crew members, U.S. astronaut Thomas Marshburn (L-R), Russian cosmonaut Roman Romanenko and Canadian astronaut Chris Hadfield sit in their suits during a training at Baikonur cosmodrome December 7, 2012. The three-man crew is scheduled to fly to the International Space Station on December 19. REUTERS/Sergei Remezov (KAZAKHSTAN – Tags: SCIENCE TECHNOLOGY TRANSPORT) – RTR3BBHM

Bushfires in Australia are pictured in this January 2, 2013 handout photo taken by Canadian astronaut Chris Hadfield aboard the International Space Station. Photo obtained by Reuters January 8, 2013. REUTERS/Chris Hadfield/NASA/Handout (UNITED STATES – Tags: DISASTER) THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS – RTR3C87I

Italy’s Mount Etna streaming ash after it erupted is pictured in this handout photo taken by Canadian astronaut Chris Hadfield February 28, 2013, aboard the International Space Station courtesy of NASA. REUTERS/Chris Hadfield/NASA/Handout (ITALY – Tags: SCIENCE TECHNOLOGY) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS – RTR3EF74

Shiraz, Iran is pictured in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency, who is photographing Earth from the International Space Station, taken on March 20, 2013. REUTERS/CSA/Col. Chris Hadfield/Handout (IRAN – Tags: SCIENCE TECHNOLOGY ENVIRONMENT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS – RTR3F8X6

The Nile and the Sinai Peninsula are pictured in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency, who is photographing Earth from the International Space Station, taken on March 20, 2013. REUTERS/CSA/Col. Chris Hadfield/Handout (EGYPT – Tags: SCIENCE TECHNOLOGY ENVIRONMENT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS – RTR3F8XJ

A gyre frozen into the ice, in Newfoundland, Canada is pictured in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency, from the International Space Station, taken on March 22, 2013. REUTERS/CSA/Col. Chris Hadfield/Handout (CANADA – Tags: SCIENCE TECHNOLOGY ENVIRONMENT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS – RTXXTP2

Canadian Space Agency astronaut Chris Hadfield, Expedition 34 flight engineer, watches a water bubble float freely between him and the camera, showing his image refracted, in the Unity node of the International Space Station, in this handout photo courtesy of NASA, taken January 21, 2013. Hadfield becomes the first Canadian commander of the International Space Station, March 13, 2013. REUTERS/NASA/Handout (OUTER SPACE – Tags: SCIENCE TECHNOLOGY TPX IMAGES OF THE DAY) THIS PICTURE WAS PROCESSED BY REUTERS TO ENHANCE QUALITY AN UNPROCESSED VERSION WILL BE PROVIDED SEPARATELY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS – RTR3EXAU

The iconic Manicouagan meteor crater in Quebec is pictured in this handout photo taken March 14, 2013, courtesy of the Canadian Space Agency. The crater is one of the oldest known impact craters on Earth, still visible from space and is located primarily in Manicouagan Regional County Municipality in the C te-Nord region of Qu bec. REUTERS/CSA/Chris Hadfield/Handout (CANADA – Tags: SCIENCE TECHNOLOGY ENVIRONMENT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS – RTR3F11G

The moon is pictured above Earth in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency. REUTERS/CSA/Col. Chris Hadfield/Handout (OUTER SPACE – Tags: SCIENCE TECHNOLOGY ENVIRONMENT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS – RTR3F62R

Baghdad Iraq is pictured in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency, who is photographing Earth from the International Space Station, taken on March 20, 2013. REUTERS/CSA/Col. Chris Hadfield/Handout (IRAQ – Tags: SCIENCE TECHNOLOGY ENVIRONMENT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS – RTR3F8R7

The islands of Dubai in the United Arab Emirates are pictured in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency, who is photographing Earth from the International Space Station, taken on March 20, 2013. REUTERS/CSA/Col. Chris Hadfield/Handout (UNITED ARAB EMIRATES – Tags: SCIENCE TECHNOLOGY ENVIRONMENT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS – RTR3F8X5

Handout grab taken from YouTube of Commander Chris Hadfield who has said goodbye to life on the International Space Station by making a cover version of David Bowie’s Space Oddity. PRESS ASSOCIATION Photo. Issue date: Monday May 13, 2013. See PA story SHOWBIZ Bowie. Photo credit should read: Commander Chris Hadfield/YouTube/PA Wire NOTE TO EDITORS: This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder.

A gyre frozen into the ice, in Newfoundland, Canada is pictured in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency, from the International Space Station, taken on March 22, 2013. REUTERS/CSA/Col. Chris Hadfield/Handout

Canadian Space Agency astronaut Chris Hadfield, Expedition 34 flight engineer, watches a water bubble float freely between him and the camera, showing his image refracted, in the Unity node of the International Space Station, in this handout photo courtesy of NASA, taken January 21, 2013. Hadfield becomes the first Canadian commander of the International Space Station, March 13, 2013. REUTERS/NASA/

Shiraz, Iran is pictured in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency, who is photographing Earth from the International Space Station, taken on March 20, 2013. REUTERS/CSA/Col. Chris Hadfield/Handout

Space Shuttle Endeavour astronaut Scott Parazynski and Canadian astronaut Chris Hadfield work on the Destiny module panel to connect cables for the Canadarm 2 robotic arm to the International Space Station on April 24, 2001. Parazynski and Hadfield worked on the power and data system that will allow the station’s new construction robot to go to work. SV/ME – RTRHD4X

Canadian astronaut Chris Hadfield, Russian cosmonaut Roman Romanenko and U.S. astronaut Thomas Marshburn (L-R) pose for a picture before an exam on a simulator of the International Space Station at the Russian cosmonaut training centre at Star City outside Moscow November 28, 2012. The three-man crew is scheduled to fly to the International Space Station in December. REUTERS/Sergei Remezov (RUSSIA – Tags: SCIENCE TECHNOLOGY TRANSPORT) – RTR3AYI9

Bushfires in Australia are pictured in this January 2, 2013 handout photo taken by Canadian astronaut Chris Hadfield aboard the International Space Station. Photo obtained by Reuters January 8, 2013. REUTERS/Chris Hadfield/NASA/Handout

Italy’s Mount Etna streaming ash after it erupted is pictured in this handout photo taken by Canadian astronaut Chris Hadfield February 28, 2013, aboard the International Space Station courtesy of NASA. REUTERS/Chris Hadfield/NASA/Handout

The Nile and the Sinai Peninsula are pictured in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency, who is photographing Earth from the International Space Station, taken on March 20, 2013. REUTERS/CSA/Col. Chris Hadfield/Handout

The iconic Manicouagan meteor crater in Quebec is pictured in this handout photo taken March 14, 2013, courtesy of the Canadian Space Agency. The crater is one of the oldest known impact craters on Earth, still visible from space and is located primarily in Manicouagan Regional County Municipality in the C te-Nord region of Qu bec. REUTERS/CSA/Chris Hadfield

The moon is pictured above Earth (Picture: CSA/Chris Hadfield)

Baghdad Iraq is pictured in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency, who is photographing Earth from the International Space Station, taken on March 20, 2013. REUTERS/CSA/Col. Chris Hadfield/

The islands of Dubai in the United Arab Emirates are pictured in this handout photo courtesy of Col. Chris Hadfield of the Canadian Space Agency, who is photographing Earth from the International Space Station, taken on March 20, 2013. REUTERS/CSA/Col. Chris Hadfield